Check Engine Light - O2 Sensor & Knock Sensor

[act2007]

Just got a check engine light over the weekend. I plugged in the OBDII & wrote down the codes on a piece of paper, but misplaced it. However, there were a total of 4 codes (2 different codes). One of them is the knock sensor (0326/27/28), forgot which one. The other is the passenger side post cat O2 sensor malfunction.

I reset the ECU & the code seems to disappear for now. However, I'm a little concerned. I believe the O2 sensor & Knock sensor don't have anything related. It's kind of odd that both code appear at the same time. Any ideas?

Alan

[act2007]

I just took my car out for a drive & jump on the throttle hard took 2nd gear from 4K RPM to redline, then

3rd to redline, then 4th to about 5.5K RPM. then the check engine light came on...It's P0328 (High Input on Knock Sensor)...I just recently upgraded my ECU to the Hi Torque version (Brand new from Lotus)...I did some search & there were this issue happened to some V8's that upgraded to the Hi-Torque ECU. Can someone who experienced this before tell me how it was resolved?

[peter_england99]

I'm not an expert on knocking but a couple of reasons for this could be:

1) Boost to high. Have you monitored your boost (MAP) and inlet temp (IAT)? If the MAP goes above 0.75bar then you may be over boosting.

2) Fuel quality. What fuel do you use? Simplistically the higher the octan the less chance of knocking.

I used the Sport 350 ECU for a while and had no problem with the check engine light coming on.

Regards,

Peter.

I just took my car out for a drive & jump on the throttle hard took 2nd gear from 4K RPM to redline, then

3rd to redline, then 4th to about 5.5K RPM. then the check engine light came on...It's P0328 (High Input on Knock Sensor)...I just recently upgraded my ECU to the Hi Torque version (Brand new from Lotus)...I did some search & there were this issue happened to some V8's that upgraded to the Hi-Torque ECU. Can someone who experienced this before tell me how it was resolved?

[act2007]

I'm not an expert on knocking but a couple of reasons for this could be:

1) Boost to high. Have you monitored your boost (MAP) and inlet temp (IAT)? If the MAP goes above 0.75bar then you may be over boosting.

2) Fuel quality. What fuel do you use? Simplistically the higher the octan the less chance of knocking.

I used the Sport 350 ECU for a while and had no problem with the check engine light coming on.

Regards,

Peter.

Thanks Peter...I'm gonna try to pump in some higher octane gasoline & see how it goes...it's not knocking at all though...it only has the faulty code so I suspected that it's the knock sensor itself that's bad.

Alan

[Günter]

... I suspected that it's the knock sensor itself that's bad.

Alan

can you post your knock voltage readings, so we can compare with our data sheets... !?

[act2007]

Actually I don't have the actual "Knock"...I just checked the shop manual yesterday and my code P0328 (Knock Sensor Circuit High Input) indicates either the knock sensor itself is bad or the ground point is bad. So I'll look into that first. I'll post the updated info once the problem is located.

Alan

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